Biogas 905

Многоканальный газовый анализатор
Biogas 905


The Biogas Analyser 905 monitors either continuously or intermittently, the gas components contained in the Biogas and optionally, monitors the surrounding air to provide an early warning of dangerous, explosive and non-combustible gases and vapours.

Fields of Application

  • Monitoring of Biogas components
  • Warning of explosive gas mixtures
  • Warning of gases that endanger health
  • Warning of non-combustible gases


  • Up to 5 sensors for Biogas measurements
  • Up to 3 sensors for room monitoring
  • Time-controlled measurements in intermittent mode
  • 4-line display, each line with 16 characters
  • Menu-assisted operation via 6 keys
  • 16 freely configurable alarms
    (max. 3 per measurement point or sensor)
  • Adjustable alarm threshold, from 5 -100 % of the measurement range
  • A minimum of 5 floating alarm contacts for optional assignment
  • Floating service and fault contact
  • 5 analog outputs, 4-20 mA
  • 5 digital inputs for control functions (initiating a measurement, selection of a measurement point)
  • Double measurement change-over switch in the standard housing (optional); extras by request
  • Serial output RS 232 or RS 485
  • Manual flow-through adjustment
  • Gas components-filter system and conditioning
  • Condensate collector for external installation
  • High degree of operational reliability
  • Low power consumption
  • Water sensor for the detection of condensate break-through

Measurable gases

Gas Formula
Methane CH4
Hydrogen sulphide H2S
Carbon dioxide CO2
Oxygen O2
Hydrogen H2
other gases by request  

Technical Data

Details apply, per control unit
Sensors: Electrochemical sensors
Infrared sensors
Semiconductor sensors
Sensor input: 2-wire sensors (TOX 592) or
3-wire sensors (GTR 196)
for warning of explosive gas mixtures
Sensor supply: 24 V DC / 200 mA max.
Test ranges: CO2: 0 - 50 ... 100 Vol.%
CH4: 0-100 Vol.%
O2: 0 - 21 Vol.% (electrochemical)
O2: 0-5 Vol.%… 0-25 Vol.% (paramagnetic)
H2: 0-2 Vol. %
H2S: 0-50 ppm ... 0-5.000 ppm
other ranges by request
Accuracy: < ±3 %, f.s.d.
Ambient temperature: +5 °C to +45°C
Temperature effects: < 5 % for a ±20 °C change
Installation: Wall-mounting
Output signals: Current output 4-20 mA
RS 232 or RS 485 interface
a minimum of 5 floating alarm contacts for optional assignment;
1 fault relay
1 service relay
Relay rating: 230 V, 450 VA
Voltage supply:
230V / 50Hz
115V / 60Hz
Power consumption: 100 VA
(W x H x D):
600 x 500 x 400 mm (9 HU)
Weight: approx. 35 kg


Signal horn, warning light, warning banner, plotter. Other accessories will be offered, according to the measurement tasks required.